feat: temporary event reducer for testing API
feat: temporary event reducer for testing API

The reducer would be rewritten as long as the state management method is
decided (maybe adopting *MobX* or *Redux*)

weihanglo/pycontw-mobile,weihanglo/pycontw-mobile,weihanglo/pycontw-mobile,weihanglo/pycontw-mobile,weihanglo/pycontw-mobile,weihanglo/pycontw-mobile